QuakeFactsEvidence report · prepared 2 September 2026https://quakes99.com/entity/usp0002d95
USGS usp0002d95
28 Mar 1985, 16:07
9 km N of Takanosu, Japan
A magnitude 6.4 mw earthquake at 166.3 km depth.
Published location
Where is 9 km N of Takanosu, Japan?
This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.
40.310000, 140.362000
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What the numbers mean
Magnitude measures event size; depth locates the source below the surface. Neither value alone establishes local damage or personal risk.
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Use local emergency authorities and the live USGS event page. This historical evidence page is not an alert service.
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Catalog fields and provenance
Event ID
usp0002d95
Coordinates
40.31, 140.362
Network
us
Significance
630